Pilobolus crystallinus

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Pilobolus crystallinus var. crystallinus
Pilobolus crystallinus (F.H. Wigg.) Tode 1013949.jpg
Pilobolus crystallinus sporangia
Scientific classification
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Tode (1784)
Binomial name
Pilobolus crystallinus var. crystallinus
(F.H.Wigg.) Tode (1784)

Pilobolus crystallinus var. crystallinus, commonly known as the "dung cannon" or "hat thrower", is a species of fungus belonging to the Mucorales order. It is unique in that it adheres its spores to vegetation, so as to be eaten by grazing animals. It then passes through the animals' digestive systems and grows in their feces. Although these fungi only grow to be 2–4 cm (0.8–1.6 in) tall, they can shoot their sporangium, containing their spores, up to 2 m (6.6 ft) away. Due to an increase of pressure in the vesicle, the sporangium can accelerate 0–45 mph in the first millimeter of its flight, which corresponds to an acceleration of an incredible 20000 g. Using a mucus-like substance found in the vesicle of the fungus, the sporangium can adhere itself onto whatever it lands, thus completing its life cycle.

Contents

The basionym of this species is Hydrogera crystallina F.H. Wigg. 1780.

The ability of this fungus to cause problems for florists was noted in the scientific literature in 1881:

... this small fungus had proved this season to be an expensive annoyance to florists engaged in winter forcing flowers. Rose-growers especially had found it to interfere seriously with their profits. The injury was caused by the projection of the sporangia which covered the flowers and leaves of the roses as if profusely dusted with black pepper. The flowers were almost unsaleable as the first impression was that the black dots were aphids. [1]

Description

This fungus normally grows beneath the surface – a sensitivity to oxygen inhibits radial growth at the hyphae. [2] According to McVickar (1942), and later amended by Ootaki et al. (1993), [3] the development of P. crystallinus may be divided into six stages: In stage I, the sporangiophore initially elongates at the apex, but does not rotate. In stage II, the sporangiophore develops a sporangium. In stage III, after the development of the sporangium, there is a temporary cessation of growth. In stage IV, a subsporangial vesicle expands beneath the sporangium. This is followed by stage V, where the spore matures, and the region of hypha directly below the subsporangial vesicle continues elongating. Finally, in stage VI, the subsporangial vesicle bursts and throws the sporangium into the air. [4] Scanning and transmission electron microscopy has shown that the surface of the sporangium is covered with crystals of two distinct sizes. [5] The larger crystals enclose spines having a central pore.

Host species

Pilobolus crystallinus has been reported to grow on the dung of cattle. [6]

Related Research Articles

<span class="mw-page-title-main">Hypha</span> Long, filamentous structure in fungi and Actinobacteria

A hypha is a long, branching, filamentous structure of a fungus, oomycete, or actinobacterium. In most fungi, hyphae are the main mode of vegetative growth, and are collectively called a mycelium.

<span class="mw-page-title-main">Sporangium</span> Enclosure in which spores are formed

A sporangium is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. Virtually all plants, fungi, and many other lineages form sporangia at some point in their life cycle. Sporangia can produce spores by mitosis, but in nearly all land plants and many fungi, sporangia are the site of meiosis and produce genetically distinct haploid spores.

<span class="mw-page-title-main">Zygomycota</span> Division or phylum of the kingdom Fungi

Zygomycota, or zygote fungi, is a former division or phylum of the kingdom Fungi. The members are now part of two phyla: the Mucoromycota and Zoopagomycota. Approximately 1060 species are known. They are mostly terrestrial in habitat, living in soil or on decaying plant or animal material. Some are parasites of plants, insects, and small animals, while others form symbiotic relationships with plants. Zygomycete hyphae may be coenocytic, forming septa only where gametes are formed or to wall off dead hyphae. Zygomycota is no longer recognised as it was not believed to be truly monophyletic.

<i>Pilobolus</i> Genus of fungi

Pilobolus is a genus of fungi that commonly grows on herbivore dung.

<span class="mw-page-title-main">Mucorales</span> Order of fungi

The Mucorales is the largest and best-studied order of zygomycete fungi. Members of this order are sometimes called pin molds. The term mucormycosis is now preferred for infections caused by molds belonging to the order Mucorales.

Sporogenesis is the production of spores in biology. The term is also used to refer to the process of reproduction via spores. Reproductive spores were found to be formed in eukaryotic organisms, such as plants, algae and fungi, during their normal reproductive life cycle. Dormant spores are formed, for example by certain fungi and algae, primarily in response to unfavorable growing conditions. Most eukaryotic spores are haploid and form through cell division, though some types are diploid or dikaryons and form through cell fusion.

<span class="mw-page-title-main">Mycelial cord</span>

Mycelial cords are linear aggregations of parallel-oriented hyphae. The mature cords are composed of wide, empty vessel hyphae surrounded by narrower sheathing hyphae. Cords may look similar to plant roots, and also frequently have similar functions; hence they are also called rhizomorphs. As well as growing underground or on the surface of trees and other plants, some fungi make mycelial cords which hang in the air from vegetation.

<i>Mucor mucedo</i> Species of fungus

Mucor mucedo, commonly known as the common pinmould, is a fungal plant pathogen and member of the phylum Mucoromycota and the genus Mucor. Commonly found on soil, dung, water, plants and moist foods, Mucor mucedo is a saprotrophic fungus found world-wide with 85 known strains. It is often mistaken for Rhizopus rots on fruits due to similar mould growth shape and colour. Contrastingly, however, Mucor mucedo is found to grow on a wide range of stored grains and plants, including cucumber and tomato. Discovered in Italy in 1729 by P.A. Micheli and later noted by Carl Linnaeus in 1753 in the Species Plantarum, Mucor mucedo was originally classified as Mucor vulgaris by Micheli but later classified synonymous under name Mucor mucedo. The species was redescribed as Ascophora mucedo by H.J. Tode in 1790 but this type resided in a stoloniferous habitat and was later made the type of new genus Rhizopus.

<i>Cyathus striatus</i> Species of fungus

Cyathus striatus, commonly known as the fluted bird's nest, is a common saprobic bird's nest fungus with a widespread distribution throughout temperate regions of the world. This fungus resembles a miniature bird's nest with numerous tiny "eggs"; the eggs, or peridioles, are actually lens-shaped bodies that contain spores. C. striatus can be distinguished from most other bird's nest fungi by its hairy exterior and grooved inner walls. Although most frequently found growing on dead wood in open forests, it also grows on wood chip mulch in urban areas. The fruiting bodies are encountered from summer until early winter. The color and size of this species can vary somewhat, but they are typically less than a centimeter wide and tall, and grey or brown in color. Another common name given to C. striatus, splash cups, alludes to the method of spore dispersal: the sides of the cup are angled such that falling drops of water can dislodge the peridioles and eject them from the cup. The specific epithet is derived from the Latin stria, meaning "with fine ridges or grooves".

<i>Entomophthora</i> Genus of fungi

Entomophthora is a fungal genus in the family Entomophthoraceae. Species in this genus are parasitic on flies and other two-winged insects. The genus was circumscribed by German physician Johann Baptist Georg Wolfgang Fresenius (1808-1866) in 1856.

<i>Clathrus archeri</i> Species of fungus

Clathrus archeri, commonly known as octopus stinkhorn or devil's fingers, is a fungus which has a global distribution. Using rDNA, Geastrales, Gauteriales and Phallales form a monophyletic group and eventually differentiation of Nidulariales and Tulostomatales within the euagarics clade. This species was first described in 1980 in a collection from Tasmania. The young fungus erupts from a suberumpent egg by forming into four to seven elongated slender arms initially erect and attached at the top. The arms then unfold to reveal a pinkish-red interior covered with a dark-olive spore-containing gleba. In maturity it smells like putrid flesh. Recently, C. archeri var. alba with white tentacles or arms has been reported from the Shola Forests in the Western Ghats, Kerala, India.

<span class="mw-page-title-main">Pilobolaceae</span> Family of fungi

The Pilobolaceae are a family of fungi in the Mucorales order. Generally, species in this family have a widespread distribution, although there are some that are restricted to tropical and subtropical regions. This family includes two genera: Pilobolus, and Utharomyces.

<i>Cyathus stercoreus</i> Species of fungus

Cyathus stercoreus, commonly known as the dung-loving bird's nest or the dung bird's nest, is a species of fungus in the genus Cyathus, family Nidulariaceae. Like other species in the Nidulariaceae, the fruiting bodies of C. stercoreus resemble tiny bird's nests filled with eggs. The fruiting bodies are referred to as splash cups, because they are developed to use the force of falling drops of water to dislodge and disperse their spores. The species has a worldwide distribution, and prefers growing on dung, or soil containing dung; the specific epithet is derived from the Latin word stercorarius, meaning "of dung".

Limnoperdon is a fungal genus in the monotypic family Limnoperdaceae. The genus is also monotypic, as it contains a single species, the aquatic fungus Limnoperdon incarnatum. The species, described as new to science in 1976, produces fruit bodies that lack specialized structures such as a stem, cap and gills common in mushrooms. Rather, the fruit bodies—described as aquatic or floating puffballs—are small balls of loosely interwoven hyphae. The balls float on the surface of the water above submerged twigs. Experimental observations on the development of the fruit body, based on the growth on the fungus in pure culture, suggest that a thin strand of mycelium tethers the ball above water while it matures. Fruit bodies start out as a tuft of hyphae, then become cup-shaped, and eventually enclose around a single chamber that contains reddish spores. Initially discovered in a marsh in the state of Washington, the fungus has since been collected in Japan, South Africa, and Canada.

<i>Spinellus fusiger</i> Species of fungus

Spinellus fusiger, commonly known as the bonnet mold, is a species of fungus in the Zygomycota phylum. It is a pin mold that is characterized by erect sporangiophores that are simple in structure, brown or yellowish-brown in color, and with branched aerial filaments that bear the zygospores. It grows as a parasitic mold on mushrooms, including several species from the genera Mycena, including M. haematopus, M. pura, M. epipterygia, M. leptocephala, and various Collybia species, such as C. alkalivirens, C. luteifolia, C. dryophila, and C. butyracea. It has also been found growing on agaric species in Amanita, Gymnopus, and Hygrophorus.

<i>Auriscalpium vulgare</i> Inedible European fungi

Auriscalpium vulgare, commonly known as the pinecone mushroom, the cone tooth, or the ear-pick fungus, is a species of fungus in the family Auriscalpiaceae of the order Russulales. It was first described in 1753 by Carl Linnaeus, who included it as a member of the tooth fungi genus Hydnum, but British mycologist Samuel Frederick Gray recognized its uniqueness and in 1821 transferred it to the genus Auriscalpium that he created to contain it. The fungus is widely distributed in Europe, Central America, North America, and temperate Asia. Although common, its small size and nondescript colors lead it to be easily overlooked in the pine woods where it grows. A. vulgare is not generally considered edible because of its tough texture, but some historical literature says it used to be consumed in France and Italy.

<i>Rhopalomyces elegans</i> Species of fungus

Rhopalomyces elegans is a common species of zygomycete fungus, and the type species of the genus Rhopalomyces. Widely distributed, it is found in soil, rotting plant material, and animal dung. It is a facultative parasite of nematode eggs.

Allomyces macrogynus is a species of fungus in the family Blastocladiaceae. It was first described by mycologist Ralph Emerson in 1941 as a variety of Allomyces javanicus, and later given distinct species status in 1954. Its genome has been sequenced by the Broad Institute.

Cunninghamella bertholletiae is a species of zygomycetous fungi in the order Mucorales. It is found globally, with increased prevalence in Mediterranean and subtropical climates. It typically grows as a saprotroph and is found in a wide variety of substrates, including soil, fruits, vegetables, nuts, crops, and human and animal waste. Although infections are still rare, C. betholletiae is emerging as an opportunistic human pathogen, predominantly in immunocompromised people, leukemia patients, and people with uncontrolled diabetes. Cunninghamella bertholletiae infections are often highly invasive, and can be more difficult to treat with antifungal drugs than infections with other species of the Mucorales, making prompt and accurate recognition and diagnosis of mycoses caused by this fungus an important medical concern.

Stylopage is a polytypic genus of predacious fungus in the order Zoopagales, within the subphylum Zoopagomycotina. All known species of Stylopage subsist on various species of amoebae or nematodes by trapping their prey, typically using an adhesive substance that coats their vegetative hyphae, and absorbing nutrients through the projection of a haustorium. 17 extant Stylopage species have been described thus far.

References

  1. Meehan T. (1881). "Pilobolus crystallinus". Proceedings of the Academy of Natural Sciences of Philadelphia. 33: 463–64.
  2. Bourret JA. (1985). "Influence of oxygen on tip growth of Pilobolus crystallinus hyphae". Mycologia. 77 (2): 238–42. doi:10.2307/3793073.
  3. Ootaki T, Ishikawa N, Konno K, Todoriki M, Miyazaki A, Minhara H (1993). "Analysis of growth and rotational behaviour of sporangiophores in Pilobolus crystallinus (Wiggers) Tode". Planta. 189: 132–38. doi:10.1007/bf00201353.
  4. McVickar DL. (1942). "The light-controlled diurnal rhythm of asexual reproduction in Pilobolus". American Journal of Botany. 29: 372–80. doi:10.2307/2437221.
  5. Bland CE, Charles TM (1972). "Fine structure of Pilobolus: surface and wall structure". Mycologia . 64 (4): 774–85. doi:10.2307/3757932.
  6. Pauline, N'Douba Amako; Claude, Kouassi Kouadio; Clovis, Koffi N'Dono Boni; Allal, Douira; Koutoua, Ayolié (2022). "Coprophilous fungi of Daloa city: New species for the fungal flora of Côte d'Ivoire". GSC Biological and Pharmaceutical Sciences. 20 (3): 251–260. doi: 10.30574/gscbps.2022.20.3.0362 .